Plug for vials



FIG. 1 is a perspective view of a plug for vials, showing my new design;

FIG. 2 is a side elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a sectional view, taken in the direction of the arrows on line 5--5 of FIG. 3. 

The ornamental design for a plug for vials, as shown and described. 